I applied through college or university. The process took 6 weeks. I interviewed at Princeton University in Jan 2020
Interview
It was done through the office of the Dean of Undergraduate Students. You must attend a seminar first. It has a group interview then a personal interview, and this is done to see how well you will do with handling conflict.
Interview questions [1]
Question 1
Describe a time where you had a personal conflict with someone you disliked, and how did you overcome it?